Global Patent Index - EP 0679956 B1

EP 0679956 B1 2000-11-02 - Electrophotographic carrier particle compositions comrpising covering agents and process of the preparation of the same

Title (en)

Electrophotographic carrier particle compositions comrpising covering agents and process of the preparation of the same

Title (de)

Beschichtiungsmittel enthaltende elektrophotographische Trägerteilchenzusammensetzungen und Verfahren zu deren Herstellung

Title (fr)

Compositions de particles porteuses électrophotographiques comprenant des agents de revètement et procédé de préparation

Publication

EP 0679956 B1 (EN)

Application

EP 95302806 A

Priority

JP 11350894 A

Abstract (en)

[origin: EP0679956A1] This invention provides organic polysiloxanes suitable for use in coating agents in order to manufacture eletrophotography carrier particles with a superior endurance. The coating agents for the electrophotography carriers are characterized by having the organopolysiloxane expressed by the general formula below: <MATH> wherein R<1> is an organic group with 1 to 12 carbon atoms; R<2> is -CmH2m+1 as herein m >/= 3; R<3> is -CnH2n+1 as herein n is either 1 or 2; R<4> is in each case a hydrogen atom or group expressed by formulae (1) and (2) below; and subscripts a, b, c, and d are numbers which satisfy the following conditions of 0.5 < a < 2, 0 < b </= 3, 0 < c </= 3, 0 < d </= 0.5 and 0.5 < a+b+c+d </= 4. <CHEM> and <CHEM> R<5> in the above formulae (1) and (2) is an organic group with 1 to 6 carbon atoms and x in the formula (1) satisfies 1 </= x </= 2.

IPC 1-7 (main, further and additional classification)

G03G 9/113; C09D 183/04

IPC 8 full level (invention and additional information)

C08G 77/20 (2006.01); C08G 77/26 (2006.01); C08L 83/04 (2006.01); C08L 83/06 (2006.01); G03G 9/113 (2006.01)

CPC (invention and additional information)

G03G 9/1136 (2013.01); C08G 77/20 (2013.01); C08G 77/26 (2013.01); Y10T 428/29 (2013.01); Y10T 428/2982 (2013.01); Y10T 428/31663 (2015.04)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 0679956 A1 19951102; EP 0679956 B1 20001102; DE 69519246 D1 20001207; DE 69519246 T2 20010613; JP 3403805 B2 20030506; JP H07295303 A 19951110; US 5609958 A 19970311

INPADOC legal status


2009-06-30 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20080426

2009-04-30 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: FR

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20080430

2009-01-30 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20081101

2009-01-30 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20081231

2008-12-24 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20080426

2008-04-30 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20070411

- Year of fee payment: 13

2007-11-24 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20070425

- Year of fee payment: 13

2007-04-19 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20070419

- Year of fee payment: 13

2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-10-24 [26N] NO OPPOSITION FILED

2001-03-02 [ET] FR: TRANSLATION FILED

2000-12-07 [REF] CORRESPONDS TO:

- Document: DE 69519246 20001207

2000-11-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

1999-12-22 [RTI1] TITLE (CORRECTION)

- Free text: ELECTROPHOTOGRAPHIC CARRIER PARTICLE COMPOSITIONS COMRPISING COVERING AGENTS AND PROCESS OF THE PREPARATION OF THE SAME

1999-12-15 [RTI1] TITLE (CORRECTION)

- Free text: ELECTROPHOTOGRAPHIC CARRIER PARTICLE COMPOSITIONS COMRPISING COVERING AGENTS AND PROCESS OF THE PREPARATION OF THE SAME

1998-06-17 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19980504

1996-06-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19960404

1995-11-15 [RTI1] TITLE (CORRECTION)

1995-11-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB